with 2 x 20 you have half the risk of a bad roll on damage (random factor) yet 40 hit harder then 2 x 20 normaly would and with 2x 20 one group will get the damage so there are less units to devide the damage to there for it will get killed faster
Wait, so dividing units in smaller stacks doesn't lower casualties you take? Doesn't that make “flower defense” useless? Or what's the deal then?
What about if I divide my 40 infantry stack into 40 groups of 1?.
Key words are 'ATTACKS' and "DEFENSE", dividing units into 1's you are using a completely different aspect of RNG / X-factor known as "Last Stand" /Lemming dynamic which most do not acknowledge but in my experience definitely exists